title: Nickel-catalyzed reductive carboxylation of styrenes using CO2.
abstract: A nickel-catalyzed reductive carboxylation of styrenes using CO2 has been developed. The reaction proceeds under mild conditions using diethylzinc as the reductant. Preliminary data suggests the mechanism involves two discrete nickel-mediated catalytic cycles, the first involving a catalyzed hydrozincation of the alkene followed by a second, slower nickel-catalyzed carboxylation of the in situ formed organozinc reagent. Importantly, the catalyst system is very robust and will fixate CO2 in good yield even if exposed to only an equimolar amount introduced into the headspace above the reaction.
authors.affiliation: Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, USA.
authors.forename: Catherine M
authors.initials: CM
authors.lastname: Williams
authors.forename: Jeffrey B
authors.initials: JB
authors.lastname: Johnson
authors.forename: Tomislav
authors.initials: T
authors.lastname: Rovis
mesh_terms: D001555:Benzene Derivatives / Q000138:chemical synthesis; D002245:Carbon Dioxide / Q000737:chemistry*; D002264:Carboxylic Acids / Q000138:chemical synthesis*; D002384:Catalysis; D009532:Nickel / Q000737:chemistry; D010084:Oxidation-Reduction; D013343:Styrenes / Q000737:chemistry*
chemical_list: D001555:Benzene Derivatives; D002264:Carboxylic Acids; D013343:Styrenes; D002245:Carbon Dioxide; D009532:Nickel